Brake-shoe.



No. 832,092. PATBNTED 00T. 2, 1906. 11R. SPEAK. BRAKE SHOE.

APPLICATION FILED 00T. 20. 1906.

2 SHEETS-SHEET 1.

No. 832,092. PATENTED 00T. 2, 1906.

F. R. SPEAR. BRAKE SHOE.

APPLICATION FILED 00T.20 1905.-

2 SHEETS-SHEET 2.

C22/Qld.

UNITED STATES PATENT oEEIoE.

FRANK R. SPEAK, OF UHICAGO, ILLINOIS.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Oct. 2, 1906.

Application filed 001701181' 20, 1905. Serial No.. 283680.

4will cause no injury to the tire if it comes inv contact therewith. l

The invention can be embodied in carshoes and locomotive-driver shoes,both solid and composite, of all varieties, shapes, and sizes. In thedrawings I have shown the invention embodied in a variety of ways inseveral kinds of shoes, which will be fully described.

bodyine In the accompanying drawings,'.Figure 1 is a longitudinalsectional vie'w of a shoe em.- my invention with the attachinglug andguide-lugs made integral with the plate. Fig. 2 is-a sectional view onthe line 2 2 of Fig.v l. Fig. 3 is a sectional view of one end of a shoeembodying my invention and showing the end lug and guide-lug both madeintegral with theplate. Fig. 4 is a similar view showing the end lug andguide-lug made integral with the body. Fig. 5 is a top plan view of theshoe sho.'n in Fig. 1. Fig. 6 is a sectional view of an end of a shoeembodying the invention and showing the end lug integral with the plateand the guide-lug integral with the body. Fig. 7 shows the plate toothedat its ends. Fig. 8 is a plan view of the plate, showing it recessed atthe edges. Fig. 9 is a sectional ).*iew on'the line 9 9 of Fig. 6. Fig.1() is a longitudinal sectional view of a locomotive-driver shoeembodying my invention. Fig. 11 is a sectional view on the line 11 11 ofFig. 10. Figs. 12- and 13 show the attaching-lug made separate from theplate. Fig. 14 a longitudinal sectional view of a composite shoeembodying my invention. Fig. 15 is a sectional view on the line 15 15 ofFigs14. Fig. 16 is a detail sectional view showing a transverseanchoringrib on the plate. Figs. 17 and 18 show different Ways of makingthe plate.

l employ a cast malleable-iron strengthening and reinforcing back plateA, which is securely locked to the body B of the shoe at or adjacent toits back. The plate is preferably made imperforate, and it can beconveniently locked to the body by making it of less length and widththan t-he body and beveling its edges ay to makelocking connection withthe metal of the body, as shown in Fig. 2.

The attaching-lug C may be made integral with the plate, as shown inFigs. 1, 2, and elsewhere, or it can be made separate from the plate andconnected therewith in a variety of ways. In Fig. 12 the ends c of theattaching-lug C are bent toy inclose the side edgesof the plate, and inFig. 13 the ends c of the attaching-lug Cf pass through an Opening inthe plate and are turned out to engage the under side of the plate.

I may provide the plate with one or more tongues projecting angularlybeneath the attachingug and embedded in the body of the shoe to moresecurely lock the plate to the body beneath the attaching-lu I haveshown the plate provide withtwo diverging tongues D, located below theattaching-lug and embedded in the body of the shoe; but any number ofthese tongues may be employed, and they may be distributed along theplate as desired. The side edges of the tongue may be provided withteeth d, Fig. 2, to interlock with thebody metal. Instead of` employingthe tongues, or in conjunction therewith, I may provide the plate withone or more transverse locki ng-ribs E to be embedded in the body of theshoe and having-beveled edges e to make locking engagement with thebody, Figs. 1, 10, 16, or I may employ a longitudinally-extendinglocking-rib F, having beveled edges f, Figs.'14, 15.

The guide-lugs G may be made integral with the plate and the end lugs Hintegral with the body, Fig. 1, the plate being shortened or recessed atits endsin anysuitable manner to permit the body metal to flow up andform the end lugs, as shown. lug and the guide-lug at each end of theshoe may both be made integral with the plate, as i indicated by h andg, respectively, Fig. 3, or these lugs may both be made integral withthe body, as indicated by gl h, Fig. 4, or the l guide-lug may be madeintegral with the body and the end lug integral wi th the plate, asindicated by g h, Figs. 6, 9,. I may provide the end of the plate with arecess I, Fig. 17, or recess the corners, as indicated by J, Fig. 18, topermit the body metal to flow up Vabove the plate and form the end orguide The 'end IIO lugs, or both, as heretofore described; butordinarily it will be sufficient merely tornake the plate shorter thanthe body, as shown in Fie. 1.

l?I`he plate can be made with straight edves,

` Fig. 5, or it maybe provided with a plurality of recesses K, Fi 8, orotherivise indented along its sides an ends. As the plate is primarily acasting, it can be made in any desired shape and with the lugs in anyform desired, The plate will be cast curved to conform to the curvatureof the completed shoe. The

body of the shoe may be solid, Figs. 1 to 10,

of these materials answer4 the purpose ofw strengthening the shoes, theyare objectionable for the reason that they'will injure a steel tire, andthe shoes must therefore be removed from service before the body is Worndown to the late. at t e exact time it may become necessar and of'ttimesthe shoe is hung so that it will wear more rapidly at one end than atithe other. To be on the safe side and avoid liability of injuring asteel tire, the shoes are ordinarily removed from service while therestill remains a considerable ortion of the body in front of the plate. Te Worn shoe is then consigned to the scrap pile and represents aconsiderable loss. To overcome these and other disadvantages of thelates which have heretofore been used, I ma e the plate of castmalleable iron, which is a' rayiron casting subsequently annealed andistinguished from malleable iron, wrought iron, and steelwhich arestamped or cut and pressed into shape. Cast malleable iron is a verydesirablematerial for the purpose, as it is strong and durable and canbe cast in to any sha e desired with theattaching-lug and also witii theotherlugs integral therewith. The

late can be provided with tongues D- or ribs F F to lock. the plate andbody o'f the slroe together regardless of the fact that the In practicethis cannot be done tongues or ribsv'may sooner or later engage the tireof a Wheel, for cast- Ymalleable iron Will not injure a steel tire likevsteel and wrought-iron.- The body of the shoe may be Worn entirely away,and, indeed, the plate itself may be permitted to Wear, for, as beforestated, it Will -not break and will not injure the tire. The maximumdegree of wear is thus obtainable from a shoe of this character, andconversely a minimum amount of metal is left for the scrap pile. If anattaching-lug separate from the plate is used/I'prefer to make it ofsoft cast-steel, because soft Caststeel, like cast malleable iron, willnot injure the tire and Will not fracture in handling or in service.

What I claim, and desire to secure by LettersPatent, is-

1. A brake-shoe comprising a body and a. cast malleable iron platesecured to thebody at or adjacent to its back.

2.' A brake-shoe comprising a body, a cast malleable iron plate securedto the body at or adjacent toits back, and a soft cast-steelattaching-lug. 1

3. A brake-shoe comprising a body, a cast malleable iron plate securedtothe body at or adjacentto its back', and guide-lugs integral With-theplate. v

4. A brake-shoe comprising a body, a cast malleable iron plate securedto the body at or adjacent to its back, guide-lugs integral with theplate, and a soft cast-steel attaching-lug. 5. A brake-shoe comprising abody, a cast malleable iron plate secured to the body at or adjacent toits back, a soft cast-steel attaching-lug,. guide-lugs integral with theplate, and end lugs integral with the body.

6. A brake-shoe comprising a body, a cast malleable iron plate securedto the body at or adjacent to its back, and a pair of divcrging tonguesprojecting angularly into the body beneath the attachingdug andv castintegral with the plate.

7. A brake-shoe comprising a body, a cast malleable iron late secured tothe body at or adjacent to its iiack, and one or more tongues integralwith the plate and embedded in the body, said tongues having toothededges.

FRANK R. SPEAR.

Witnesses:

